Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	(Accumulated Deficit) Retained Earnings [Member]
Beginning Balance at Sep. 30, 2022	$ 321,334	$ 208	$ 398,029	$ (3,724)	$ (73,179)
Beginning Balance, Shares at Sep. 30, 2022		20,791
Exercise of stock options	1,126	$ 1	1,125
Exercise of stock options, Shares		56
Vesting of restricted stock units, net of withholding	(825)		(825)
Vesting of restricted stock units, net of withholding, Shares		37
Stock-based compensation expense	7,139		7,139
Other comprehensive (loss) income	1,049			1,049
Net loss	(28,986)				(28,986)
Ending Balance at Dec. 31, 2022	300,837	$ 209	405,468	(2,675)	(102,165)
Ending Balance, Shares at Dec. 31, 2022		20,884
Beginning Balance at Sep. 30, 2022	321,334	$ 208	398,029	(3,724)	(73,179)
Beginning Balance, Shares at Sep. 30, 2022		20,791
Net loss	(133,816)
Ending Balance at Sep. 30, 2023	$ 216,735	$ 211	424,693	(1,174)	(206,995)
Ending Balance, Shares at Sep. 30, 2023		21,059
Exercise of stock options, Shares	0
Vesting of restricted stock units, net of withholding	$ (183)	$ 1	(184)
Vesting of restricted stock units, net of withholding, Shares		97
Stock-based compensation expense	8,099		8,099
Other comprehensive (loss) income	640			640
Net loss	(33,407)				(33,407)
Ending Balance at Dec. 31, 2023	$ 191,884	$ 212	$ 432,608	$ (534)	$ (240,402)
Ending Balance, Shares at Dec. 31, 2023		21,156